No formal title needed with paper round or post (8)
I believe the answer is:
garrison
'post' is the definition.
(I know that garrison is a type of post)
'no formal title needed with paper round' is the wordplay.
'formal title' becomes 'sir' (I've seen this in another clue).
'needed with' is a charade indicator (letters next to each other) (some letters need to go next to others).
'paper' becomes 'rag' (rag can mean a newspaper).
'round' says the letters should be written in reverse.
'no'+'sir'+'rag'='nosirrag'
'nosirrag' back-to-front is 'GARRISON'.
'or' acts as a link.
(Other definitions for garrison that I've seen before include "army base?" , "Military post where troops are stationed" , "troops in base" , "Fortified troop station" , "(Soldiers stationed to guard) fortified place" .)